<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>事件的基本使用</title>
    <script vue="text/javascript" src="../js/vue.js"></script>
    <style>
			*{
				margin-top: 20px;
			}
			.demo1{
				height: 50px;
				background-color: skyblue;
			}
			.box1{
				padding: 5px;
				background-color: skyblue;
			}
			.box2{
				padding: 5px;
				background-color: orange;
			}
			.list{
				width: 200px;
				height: 200px;
				background-color: peru;
				overflow: auto;
			}
			li{
				height: 100px;
			}
		</style>

</head>
<body>
    <div id = "root">
       <h2>欢迎来到{{name}}学习</h2>
       <a href="http://www.atguigu.com" @click.prevent="showInfo">点我提示信息</a>
        <a href="http://www.baidu.com" @click.prevent="showInfo">点我提示信息</a>
        
        <!--阻止事件冒泡-->
        <div class="demo01" @click="showInfo">
            <button @click.stop="showInfo">点我提示信息</button>
        </div>

        <!--事件只触发一次-->
        <button @click.once="showInfo">点我试试</button>

        <!--使用事件捕获模式-->
        <div class="box1" @click.capture="showMsg(1)">
          div
           <div class="box2" @click="showMsg(2)">
            div2
           </div>
        </div>

         <!-- 只有event.target是当前操作的元素时才触发事件； -->
         <div class = "demo01" @click.self="showInfo">
            <button @click = "showInfo">点我提示信息</button>
         </div>

         <!--事件的默认行为立即执行,无需等待时间回调执行完毕-->
         <ul  @wheel.passive="demo" class="list">
            <li>1</li>
            <li>2</li>
            <li>3</li>
            <li>4</li>
         </ul>
    </div>
</body>
   <script type="text/javascript">
    Vue.config.productionTip = false //阻止 vue 在启动时生成生产提示。

      const vm = new Vue({
        el:'#root',
        data:{
            name:'尚硅谷',
        },
        methods:{
          showInfo(e){
            alert("大家好")
          },
          showMsg(msg){
            console.log(event,number)
            alert('同学们好')
          },
          demo(){
             for(let i = 0;i<10000;i++){
              console.log("#")
             }
             console.log('累坏了')
          }
        }
      })

      console.log(vm)
   </script>
</html>